<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-show</title>
</head>
<body>
    <div id="mask">
        <img src="./res/3.jpg" alt="">
        <br>
        <img :src="imgArr[index]" alt="">
        <a href="javascript:void(0)" v-if="index !=0" @click="prev" ><img src="./res/pre.jpg" alt=""></a>
        <a href="javascript:void(0)"  v-show="index < imgArr.length-1" @click="next"><img src="./res/next.jpg" alt=""></a>
    </div>


    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:"#mask",
            data:{
                imgArr:["./res/2.jpg",
                "./res/3.jpg",
                "./res/4.jpg",
                "./res/5.jpg"],
                index:0
            },
            methods: {
                prev:function(){
                    this.index--;
                },
                next:function(){
                    this.index++;
                }
            }
        })
    </script>
</body>
</html>